/*
  * Intel MediaSDK QSV based MPEG2 video decoder
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <stdint.h>
 #include <string.h>
 
 #include "libavutil/common.h"
 #include "libavutil/opt.h"
 
 #include "avcodec.h"
 #include "qsvdec.h"
 

 typedef struct QSVMPEG2Context {

     AVClass *class;
     QSVContext qsv;

 } QSVMPEG2Context;

 
 static av_cold int qsv_decode_close(AVCodecContext *avctx)
 {

     QSVMPEG2Context *s = avctx->priv_data;

 
     ff_qsv_decode_close(&s->qsv);
 
     return 0;
 }
 
 static av_cold int qsv_decode_init(AVCodecContext *avctx)
 {
     return 0;
 }
 
 static int qsv_decode_frame(AVCodecContext *avctx, void *data,
                             int *got_frame, AVPacket *avpkt)
 {

     QSVMPEG2Context *s = avctx->priv_data;

     AVFrame *frame    = data;
 
     return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
 }
 
 static void qsv_decode_flush(AVCodecContext *avctx)
 {
 }
 
 AVHWAccel ff_mpeg2_qsv_hwaccel = {
     .name           = "mpeg2_qsv",
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_MPEG2VIDEO,
     .pix_fmt        = AV_PIX_FMT_QSV,
 };
 

 #define OFFSET(x) offsetof(QSVMPEG2Context, x)

 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
     { "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
     { NULL },
 };
 
 static const AVClass class = {
     .class_name = "mpeg2_qsv",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };
 
 AVCodec ff_mpeg2_qsv_decoder = {
     .name           = "mpeg2_qsv",
     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 video (Intel Quick Sync Video acceleration)"),

     .priv_data_size = sizeof(QSVMPEG2Context),

     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_MPEG2VIDEO,
     .init           = qsv_decode_init,
     .decode         = qsv_decode_frame,
     .flush          = qsv_decode_flush,
     .close          = qsv_decode_close,

     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,

     .priv_class     = &class,
 };